<!DOCTYPE HTML>
<html lang="en">


<head>
    <meta charset="utf-8">
    <meta name="keywords" content="BOM, blog">
    <meta name="description" content="不向前走怎么行呢">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <meta name="renderer" content="webkit|ie-stand|ie-comp">
    <meta name="mobile-web-app-capable" content="yes">
    <meta name="format-detection" content="telephone=no">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
    <!-- Global site tag (gtag.js) - Google Analytics -->


    <title>BOM | 王大锤学编程</title>
    <link rel="icon" type="image/png" href="/favicon.png">

    <link rel="stylesheet" type="text/css" href="/libs/awesome/css/all.css">
    <link rel="stylesheet" type="text/css" href="/libs/materialize/materialize.min.css">
    <link rel="stylesheet" type="text/css" href="/libs/aos/aos.css">
    <link rel="stylesheet" type="text/css" href="/libs/animate/animate.min.css">
    <link rel="stylesheet" type="text/css" href="/libs/lightGallery/css/lightgallery.min.css">
    <link rel="stylesheet" type="text/css" href="/css/matery.css">
    <link rel="stylesheet" type="text/css" href="/css/my.css">

    <script src="/libs/jquery/jquery.min.js"></script>

<meta name="generator" content="Hexo 5.3.0"></head>




<body>
    <header class="navbar-fixed">
    <nav id="headNav" class="bg-color nav-transparent">
        <div id="navContainer" class="nav-wrapper container">
            <div class="brand-logo">
                <a href="/" class="waves-effect waves-light">
                    
                    <img src="/medias/logo.png" class="logo-img" alt="LOGO">
                    
                    <span class="logo-span">王大锤学编程</span>
                </a>
            </div>
            

<a href="#" data-target="mobile-nav" class="sidenav-trigger button-collapse"><i class="fas fa-bars"></i></a>
<ul class="right nav-menu">
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/" class="waves-effect waves-light">
      
      <i class="fas fa-home" style="zoom: 0.6;"></i>
      
      <span>Index</span>
    </a>
    
  </li>
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/tags" class="waves-effect waves-light">
      
      <i class="fas fa-tags" style="zoom: 0.6;"></i>
      
      <span>Tags</span>
    </a>
    
  </li>
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/categories" class="waves-effect waves-light">
      
      <i class="fas fa-bookmark" style="zoom: 0.6;"></i>
      
      <span>Categories</span>
    </a>
    
  </li>
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/archives" class="waves-effect waves-light">
      
      <i class="fas fa-archive" style="zoom: 0.6;"></i>
      
      <span>Archives</span>
    </a>
    
  </li>
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/about" class="waves-effect waves-light">
      
      <i class="fas fa-user-circle" style="zoom: 0.6;"></i>
      
      <span>About</span>
    </a>
    
  </li>
  
  <li class="hide-on-med-and-down nav-item">
    
    <a href="/contact" class="waves-effect waves-light">
      
      <i class="fas fa-comments" style="zoom: 0.6;"></i>
      
      <span>Contact</span>
    </a>
    
  </li>
  
  <li>
    <a href="#searchModal" class="modal-trigger waves-effect waves-light">
      <i id="searchIcon" class="fas fa-search" title="Search" style="zoom: 0.85;"></i>
    </a>
  </li>
</ul>


<div id="mobile-nav" class="side-nav sidenav">

    <div class="mobile-head bg-color">
        
        <img src="/medias/logo.png" class="logo-img circle responsive-img">
        
        <div class="logo-name">王大锤学编程</div>
        <div class="logo-desc">
            
            不向前走怎么行呢
            
        </div>
    </div>

    

    <ul class="menu-list mobile-menu-list">
        
        <li class="m-nav-item">
	  
		<a href="/" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-home"></i>
			
			Index
		</a>
          
        </li>
        
        <li class="m-nav-item">
	  
		<a href="/tags" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-tags"></i>
			
			Tags
		</a>
          
        </li>
        
        <li class="m-nav-item">
	  
		<a href="/categories" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-bookmark"></i>
			
			Categories
		</a>
          
        </li>
        
        <li class="m-nav-item">
	  
		<a href="/archives" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-archive"></i>
			
			Archives
		</a>
          
        </li>
        
        <li class="m-nav-item">
	  
		<a href="/about" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-user-circle"></i>
			
			About
		</a>
          
        </li>
        
        <li class="m-nav-item">
	  
		<a href="/contact" class="waves-effect waves-light">
			
			    <i class="fa-fw fas fa-comments"></i>
			
			Contact
		</a>
          
        </li>
        
        
    </ul>
</div>


        </div>

        
    </nav>

</header>

    



<div class="bg-cover pd-header post-cover" style="background-image: url('/medias/featureimages/0.jpg')">
    <div class="container" style="right: 0px;left: 0px;">
        <div class="row">
            <div class="col s12 m12 l12">
                <div class="brand">
                    <h1 class="description center-align post-title">BOM</h1>
                </div>
            </div>
        </div>
    </div>
</div>




<main class="post-container content">

    
    <link rel="stylesheet" href="/libs/tocbot/tocbot.css">
<style>
    #articleContent h1::before,
    #articleContent h2::before,
    #articleContent h3::before,
    #articleContent h4::before,
    #articleContent h5::before,
    #articleContent h6::before {
        display: block;
        content: " ";
        height: 100px;
        margin-top: -100px;
        visibility: hidden;
    }

    #articleContent :focus {
        outline: none;
    }

    .toc-fixed {
        position: fixed;
        top: 64px;
    }

    .toc-widget {
        width: 345px;
        padding-left: 20px;
    }

    .toc-widget .toc-title {
        padding: 35px 0 15px 17px;
        font-size: 1.5rem;
        font-weight: bold;
        line-height: 1.5rem;
    }

    .toc-widget ol {
        padding: 0;
        list-style: none;
    }

    #toc-content {
        padding-bottom: 30px;
        overflow: auto;
    }

    #toc-content ol {
        padding-left: 10px;
    }

    #toc-content ol li {
        padding-left: 10px;
    }

    #toc-content .toc-link:hover {
        color: #42b983;
        font-weight: 700;
        text-decoration: underline;
    }

    #toc-content .toc-link::before {
        background-color: transparent;
        max-height: 25px;

        position: absolute;
        right: 23.5vw;
        display: block;
    }

    #toc-content .is-active-link {
        color: #42b983;
    }

    #floating-toc-btn {
        position: fixed;
        right: 15px;
        bottom: 76px;
        padding-top: 15px;
        margin-bottom: 0;
        z-index: 998;
    }

    #floating-toc-btn .btn-floating {
        width: 48px;
        height: 48px;
    }

    #floating-toc-btn .btn-floating i {
        line-height: 48px;
        font-size: 1.4rem;
    }
</style>
<div class="row">
    <div id="main-content" class="col s12 m12 l9">
        <!-- 文章内容详情 -->
<div id="artDetail">
    <div class="card">
        <div class="card-content article-info">
            <div class="row tag-cate">
                <div class="col s7">
                    
                    <div class="article-tag">
                        
                            <a href="/tags/javascript/">
                                <span class="chip bg-color">javascript</span>
                            </a>
                        
                    </div>
                    
                </div>
                <div class="col s5 right-align">
                    
                    <div class="post-cate">
                        <i class="fas fa-bookmark fa-fw icon-category"></i>
                        
                            <a href="/categories/javascript/" class="post-category">
                                javascript
                            </a>
                        
                    </div>
                    
                </div>
            </div>

            <div class="post-info">
                
                <div class="post-date info-break-policy">
                    <i class="far fa-calendar-minus fa-fw"></i>Publish Date:&nbsp;&nbsp;
                    2016-06-18
                </div>
                

                

                
                <div class="info-break-policy">
                    <i class="far fa-file-word fa-fw"></i>Word Count:&nbsp;&nbsp;
                    1.7k
                </div>
                

                
                <div class="info-break-policy">
                    <i class="far fa-clock fa-fw"></i>Read Times:&nbsp;&nbsp;
                    6 Min
                </div>
                

                
            </div>
        </div>
        <hr class="clearfix">

        
        <!-- 是否加载使用自带的 prismjs. -->
        <link rel="stylesheet" href="/libs/prism/prism.css">
        

        

        <div class="card-content article-card-content">
            <div id="articleContent">
                <h1 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h1><p>浏览器对象模型BOM（Browser Object Model），提供了访问和操作浏览器窗口的接口。<br>BOM整体对象图。<br><img src="http://wx4.sinaimg.cn/mw690/c2da5891gy1fo8u45pacgj20eh0d4js3.jpg" alt=""></p>
<h1 id="window对象"><a href="#window对象" class="headerlink" title="window对象"></a>window对象</h1><p>window对象在js中比较特殊，它既是ECMAScript中的Global对象的代理者，也是窗口模型BOM中的顶层对象。</p>
<ol>
<li>引用window对象的属性和方法时，可以省略window。</li>
<li>在全局作用域中this和window指向同一个对象，另外，还可以使用self来引用window对象，全等关系即：<pre class="line-numbers language-js" data-language="js"><code class="language-js"><span class="token keyword">this</span><span class="token operator">===</span>window<span class="token operator">===</span>self<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre></li>
<li>在全局作用域中定义的变量和函数也会成为window对象的属性和方法，但是和直接在window对象上定义属性还是有区别：<br>a、全局变量不能使用delete删除（相当于给window定义属性时将属性特性[[Configurable]]赋值为false了），<br>直接在window对象上定义的属性可以使用delete删除（直接定义window对象时属性特性[[Configurable]]赋值默认为true）。<br>如果同时定义了全局变量和window对象的属性，则删除window属性时不起作用。</li>
</ol>
<p>b、尝试访问未定义的全局变量会抛出异常，但是访问未定义的window对象的属性则只是返回undefined。</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js"><span class="token keyword">var</span> name <span class="token operator">=</span> <span class="token string">'Games'</span><span class="token punctuation">;</span>                               <span class="token comment">//全局作用域中定义的变量和函数会成为window对象的属性和方法，但是不能使用delete删除</span>
<span class="token keyword">function</span> <span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">&#123;</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>name<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>window<span class="token punctuation">.</span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>                       <span class="token comment">// Games</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>window<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>                  <span class="token comment">// Games</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token keyword">this</span> <span class="token operator">==</span> window<span class="token punctuation">)</span><span class="token punctuation">;</span>                    <span class="token comment">// true</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token keyword">this</span> <span class="token operator">==</span> self<span class="token punctuation">)</span><span class="token punctuation">;</span>                      <span class="token comment">//  true</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>window <span class="token operator">==</span> self<span class="token punctuation">)</span><span class="token punctuation">;</span>                    <span class="token comment">// true</span>

window<span class="token punctuation">.</span>name <span class="token operator">=</span> <span class="token string">'Kobe'</span><span class="token punctuation">;</span>                            <span class="token comment">//直接在window对象上定义属性，会同时修改全局变量的值，相反，修改全局变量的值，window对象的属性值也会修改</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">delete</span> window<span class="token punctuation">.</span>name<span class="token punctuation">;</span>                              <span class="token comment">//既定义了全局变量，又在window对象上定义了属性，删除时虽然没有报错，但是并没有起作用</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>                              <span class="token comment">//Kobe</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>window<span class="token punctuation">.</span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>                       <span class="token comment">//Kobe</span>

window<span class="token punctuation">.</span>team <span class="token operator">=</span> <span class="token string">'cavs'</span><span class="token punctuation">;</span>                            <span class="token comment">//直接在window对象上定义属性，可以使用delete删除</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>window<span class="token punctuation">.</span>team<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">delete</span> window<span class="token punctuation">.</span>color<span class="token punctuation">;</span>
console<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>window<span class="token punctuation">.</span>color<span class="token punctuation">)</span><span class="token punctuation">;</span>                      <span class="token comment">//undefined</span>
<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h1 id="window对象的方法"><a href="#window对象的方法" class="headerlink" title="window对象的方法"></a>window对象的方法</h1><ul>
<li><p>打开新窗口<br><code>open()</code><br>返回新打开窗口的引用，利用该引用可以继续操作该新窗口</p>
</li>
<li><p>窗口移动到的位置<br><code>moveTo(x,y)</code><br>x和y表示新位置的x和y坐标值</p>
</li>
</ul>
<ul>
<li>窗口移动的尺寸<br><code>moveBy(x,y)</code><br>x和y表示在水平和垂直方向上移动的像素数</li>
</ul>
<ul>
<li>窗口宽高尺寸<br><code>resizeTo(x,y)</code><br>x和y表示浏览器窗口的新宽度和新高度  </li>
</ul>
<ul>
<li><p>窗口宽高变化尺寸<br><code>resizeBy(x,y)</code><br>x和y表示浏览器窗口的宽高变化尺寸  </p>
</li>
<li><p>提示框<br><code>alert()</code>    </p>
</li>
<li><p>提示框-显示时包含传入的字符串和“确定”按钮</p>
</li>
<li><p>确认框<br><code>confirm()</code><br>确认框-点击“确认”返回true，点击“取消”返回false</p>
</li>
<li><p>文本输入框<br><code>prompt()</code><br>“确认”按钮（返回文本输入域的内容）、“取消”按钮（返回null）和文本输入域。</p>
</li>
<li><p>搜索对话框<br><code>find()</code><br>等同使用浏览器菜单栏的“查找”命令打开对话框</p>
</li>
<li><p>打印对话框<br>  <code>print()</code><br>等同使用浏览器菜单栏的“打印”命令打开对话框</p>
</li>
<li><p>定时器只执行一次<br><code>setTimeOut()</code><br>参数为：执行函数或代码、执行代码前需要等待的时间（毫秒）</p>
</li>
<li><p>取消一次定时器<br>  <code>clearTimeOut()</code><br>参数为setTimeout()的引用</p>
</li>
<li><p>循环执行<br>  <code>setInterval()</code><br>参数为：执行函数或代码、循环执行代码的间隔时间（毫秒）</p>
</li>
<li><p>取消循环执行<br>  <code>clearInterval()</code><br>参数为setInterval()的引用</p>
</li>
</ul>
<h1 id="location对象"><a href="#location对象" class="headerlink" title="location对象"></a>location对象</h1><p> location对象提供了与当前窗口中加载的文档有关的信息以及一些导航功能;它既是window对象的属性，同时也是document对象的属性.</p>
<h2 id="主要属性有："><a href="#主要属性有：" class="headerlink" title="主要属性有："></a>主要属性有：</h2><p><code>href</code></p>
<p>返回当前完整的URL地址==location.toString()</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">http<span class="token operator">:</span><span class="token operator">/</span><span class="token operator">/</span>www<span class="token punctuation">.</span>nba<span class="token punctuation">.</span>com<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>host</code>    </p>
<p>返回服务器名称和端口号 </p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">www<span class="token punctuation">.</span>nba<span class="token punctuation">.</span>com<span class="token operator">:</span><span class="token number">80</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>hostname</code>    </p>
<p>返回服务器名称</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">www<span class="token punctuation">.</span>nba<span class="token punctuation">.</span>com	<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>port</code>    </p>
<p>返回URL中指定的端口号,如果没有,返回空字符串</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js"><span class="token number">8080</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>pathname</code>    </p>
<p>返回URL中的目录和文件名</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js"><span class="token operator">/</span>games<span class="token operator">/</span><span class="token number">2015</span>	<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>protocol</code>    </p>
<p>返回页面使用的协议，通常是http:或https:</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">http<span class="token operator">:</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<h2 id="主要方法有："><a href="#主要方法有：" class="headerlink" title="主要方法有："></a>主要方法有：</h2><p><code>search()</code>    </p>
<p>返回URL的查询字符串，这个字符串以问号开头</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">？username<span class="token operator">=</span>Games	<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>assign()</code>    </p>
<p>立即打开新URL并在浏览器历史中生成一条记录，相当于直接设置location.href值，<br>也可以修改location对象的其它属性来重新加载</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">location<span class="token punctuation">.</span><span class="token function">assign</span><span class="token punctuation">(</span>url<span class="token punctuation">)</span>	<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>replace()</code>    </p>
<p>打开新URL，但是不会生成历史记录，使用replace()之后，用户不能通过“后退”回到前一个页面</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">location<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span>url<span class="token punctuation">)</span>	<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>reload()</code><br>重新加载当前页面，不传递参数时会以最有效方式加载（可能从缓存中加载），<br>传入true时，则强制从浏览器重新加载</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">location<span class="token punctuation">.</span><span class="token function">reload</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token boolean">true</span><span class="token punctuation">]</span><span class="token punctuation">)</span>	<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<h1 id="history对象"><a href="#history对象" class="headerlink" title="history对象"></a>history对象</h1><p> history对象保存着从窗口被打开起的历史记录，每个浏览器窗口、标签页、框架都有自己的history对象。<br> history对象的主要属性和方法有：</p>
<p><code>length</code>    历史记录的数量    判断为第一个窗口：if(history.length == 0)<br><code>go()</code>    0表示刷新页面    history.go(0);<br>负数表示向后跳转    </p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">history<span class="token punctuation">.</span><span class="token function">go</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>正数表示向前跳转    </p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">history<span class="token punctuation">.</span><span class="token function">go</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>字符串参数，表示跳转到历史记录中包含该字符串的最近一个位置（可能前进，也可能后退）    </p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">history<span class="token punctuation">.</span><span class="token function">go</span><span class="token punctuation">(</span><span class="token string">'nba'</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><code>back()</code><br>后退一页，可模仿浏览器“后退”按钮    </p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">history<span class="token punctuation">.</span><span class="token function">back</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>相当于history.go(-1);<br><code>forward()</code></p>
<p>前进一页，可模仿浏览器“前进”按钮</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js">history<span class="token punctuation">.</span><span class="token function">forward</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>  相当于history.go(1);</p>
<h1 id="navigator对象"><a href="#navigator对象" class="headerlink" title="navigator对象"></a>navigator对象</h1><p>navigator对象用来描述浏览器本身，包括浏览器的名称、版本、语言、系统平台、用户特性字符串等信息.但是各个浏览器及浏览器的不同版本之间对这个对象的实现也不尽相同.<br>特性检测：不建议直接使用navigator的方法或属性进行检测浏览器版本，在使用特定方法时，如果担心兼容性，则可以使用特性检测。</p>
<pre class="line-numbers language-js" data-language="js"><code class="language-js"><span class="token keyword">function</span> <span class="token function">getElement</span><span class="token punctuation">(</span><span class="token parameter">id</span><span class="token punctuation">)</span><span class="token punctuation">&#123;</span>
    <span class="token keyword">if</span><span class="token punctuation">(</span>document<span class="token punctuation">.</span>getElementById<span class="token punctuation">)</span><span class="token punctuation">&#123;</span>   <span class="token comment">//特性检测，如果支持，优先使用document.getElementById()</span>
        <span class="token keyword">return</span> document<span class="token punctuation">.</span><span class="token function">getElementById</span><span class="token punctuation">(</span>id<span class="token punctuation">)</span><span class="token punctuation">;</span>    
    <span class="token punctuation">&#125;</span><span class="token keyword">else</span>
    <span class="token punctuation">&#123;</span>
        <span class="token keyword">return</span> document<span class="token punctuation">.</span>all<span class="token punctuation">[</span>id<span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token comment">//如果不支持getElementById方法则返回document.all</span>
    <span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h1 id="screen对象"><a href="#screen对象" class="headerlink" title="screen对象"></a>screen对象</h1><p>screen对象用来表明客户端显示器的能力。多用于测定客户端能力的站点跟踪工具中。<br>包括浏览器窗口外部的显示器的信息，如像素宽度和高度等，每个浏览器中的screen对象都包含着各不相同的属性。<br>其中五大浏览器都支持的属性有：</p>
<p><code>height</code><br>屏幕的像素高度<br><code>width</code><br>屏幕的像素宽度<br><code>availHeight</code><br>屏幕的像素高度减系统部件高度之后的值<br><code>availWidth</code><br>屏幕的像素宽度减系统部件宽度之后的值</p>
<h1 id="document对象"><a href="#document对象" class="headerlink" title="document对象"></a>document对象</h1><p>这个对象功能十分强大，可以操作网页中的任何一个元素。具体后面会专门写一片DOM的文章。</p>

                
            </div>
            <hr/>

            

    <div class="reprint" id="reprint-statement">
        
            <div class="reprint__author">
                <span class="reprint-meta" style="font-weight: bold;">
                    <i class="fas fa-user">
                        Author:
                    </i>
                </span>
                <span class="reprint-info">
                    <a href="/about" rel="external nofollow noreferrer">wanglian</a>
                </span>
            </div>
            <div class="reprint__type">
                <span class="reprint-meta" style="font-weight: bold;">
                    <i class="fas fa-link">
                        Link:
                    </i>
                </span>
                <span class="reprint-info">
                    <a href="https://github.com/fernandozhaxi/fernandozhaxi.github.io/2016/06/18/bom/">https://github.com/fernandozhaxi/fernandozhaxi.github.io/2016/06/18/bom/</a>
                </span>
            </div>
            <div class="reprint__notice">
                <span class="reprint-meta" style="font-weight: bold;">
                    <i class="fas fa-copyright">
                        Reprint policy:
                    </i>
                </span>
                <span class="reprint-info">
                    All articles in this blog are used except for special statements
                    <a href="https://creativecommons.org/licenses/by/4.0/deed.zh" rel="external nofollow noreferrer" target="_blank">CC BY 4.0</a>
                    reprint polocy. If reproduced, please indicate source
                    <a href="/about" target="_blank">wanglian</a>
                    !
                </span>
            </div>
        
    </div>

    <script async defer>
      document.addEventListener("copy", function (e) {
        let toastHTML = '<span>Copied successfully, please follow the reprint policy of this article</span><button class="btn-flat toast-action" onclick="navToReprintStatement()" style="font-size: smaller">more</a>';
        M.toast({html: toastHTML})
      });

      function navToReprintStatement() {
        $("html, body").animate({scrollTop: $("#reprint-statement").offset().top - 80}, 800);
      }
    </script>



            <div class="tag_share" style="display: block;">
                <div class="post-meta__tag-list" style="display: inline-block;">
                    
                        <div class="article-tag">
                            
                                <a href="/tags/javascript/">
                                    <span class="chip bg-color">javascript</span>
                                </a>
                            
                        </div>
                    
                </div>
                <div class="post_share" style="zoom: 80%; width: fit-content; display: inline-block; float: right; margin: -0.15rem 0;">
                    <link rel="stylesheet" type="text/css" href="/libs/share/css/share.min.css">
<div id="article-share">

    
    <div class="social-share" data-sites="twitter,facebook,google,qq,qzone,wechat,weibo,douban,linkedin" data-wechat-qrcode-helper="<p>微信扫一扫即可分享！</p>"></div>
    <script src="/libs/share/js/social-share.min.js"></script>
    

    

</div>

                </div>
            </div>
            
        </div>
    </div>

    

    

    

    

    
        <style>
    .valine-card {
        margin: 1.5rem auto;
    }

    .valine-card .card-content {
        padding: 20px 20px 5px 20px;
    }

    #vcomments textarea {
        box-sizing: border-box;
        background: url("/medias/comment_bg.png") 100% 100% no-repeat;
    }

    #vcomments p {
        margin: 2px 2px 10px;
        font-size: 1.05rem;
        line-height: 1.78rem;
    }

    #vcomments blockquote p {
        text-indent: 0.2rem;
    }

    #vcomments a {
        padding: 0 2px;
        color: #4cbf30;
        font-weight: 500;
        text-decoration: none;
    }

    #vcomments img {
        max-width: 100%;
        height: auto;
        cursor: pointer;
    }

    #vcomments ol li {
        list-style-type: decimal;
    }

    #vcomments ol,
    ul {
        display: block;
        padding-left: 2em;
        word-spacing: 0.05rem;
    }

    #vcomments ul li,
    ol li {
        display: list-item;
        line-height: 1.8rem;
        font-size: 1rem;
    }

    #vcomments ul li {
        list-style-type: disc;
    }

    #vcomments ul ul li {
        list-style-type: circle;
    }

    #vcomments table, th, td {
        padding: 12px 13px;
        border: 1px solid #dfe2e5;
    }

    #vcomments table, th, td {
        border: 0;
    }

    table tr:nth-child(2n), thead {
        background-color: #fafafa;
    }

    #vcomments table th {
        background-color: #f2f2f2;
        min-width: 80px;
    }

    #vcomments table td {
        min-width: 80px;
    }

    #vcomments h1 {
        font-size: 1.85rem;
        font-weight: bold;
        line-height: 2.2rem;
    }

    #vcomments h2 {
        font-size: 1.65rem;
        font-weight: bold;
        line-height: 1.9rem;
    }

    #vcomments h3 {
        font-size: 1.45rem;
        font-weight: bold;
        line-height: 1.7rem;
    }

    #vcomments h4 {
        font-size: 1.25rem;
        font-weight: bold;
        line-height: 1.5rem;
    }

    #vcomments h5 {
        font-size: 1.1rem;
        font-weight: bold;
        line-height: 1.4rem;
    }

    #vcomments h6 {
        font-size: 1rem;
        line-height: 1.3rem;
    }

    #vcomments p {
        font-size: 1rem;
        line-height: 1.5rem;
    }

    #vcomments hr {
        margin: 12px 0;
        border: 0;
        border-top: 1px solid #ccc;
    }

    #vcomments blockquote {
        margin: 15px 0;
        border-left: 5px solid #42b983;
        padding: 1rem 0.8rem 0.3rem 0.8rem;
        color: #666;
        background-color: rgba(66, 185, 131, .1);
    }

    #vcomments pre {
        font-family: monospace, monospace;
        padding: 1.2em;
        margin: .5em 0;
        background: #272822;
        overflow: auto;
        border-radius: 0.3em;
        tab-size: 4;
    }

    #vcomments code {
        font-family: monospace, monospace;
        padding: 1px 3px;
        font-size: 0.92rem;
        color: #e96900;
        background-color: #f8f8f8;
        border-radius: 2px;
    }

    #vcomments pre code {
        font-family: monospace, monospace;
        padding: 0;
        color: #e8eaf6;
        background-color: #272822;
    }

    #vcomments pre[class*="language-"] {
        padding: 1.2em;
        margin: .5em 0;
    }

    #vcomments code[class*="language-"],
    pre[class*="language-"] {
        color: #e8eaf6;
    }

    #vcomments [type="checkbox"]:not(:checked), [type="checkbox"]:checked {
        position: inherit;
        margin-left: -1.3rem;
        margin-right: 0.4rem;
        margin-top: -1px;
        vertical-align: middle;
        left: unset;
        visibility: visible;
    }

    #vcomments b,
    strong {
        font-weight: bold;
    }

    #vcomments dfn {
        font-style: italic;
    }

    #vcomments small {
        font-size: 85%;
    }

    #vcomments cite {
        font-style: normal;
    }

    #vcomments mark {
        background-color: #fcf8e3;
        padding: .2em;
    }

    #vcomments table, th, td {
        padding: 12px 13px;
        border: 1px solid #dfe2e5;
    }

    table tr:nth-child(2n), thead {
        background-color: #fafafa;
    }

    #vcomments table th {
        background-color: #f2f2f2;
        min-width: 80px;
    }

    #vcomments table td {
        min-width: 80px;
    }

    #vcomments [type="checkbox"]:not(:checked), [type="checkbox"]:checked {
        position: inherit;
        margin-left: -1.3rem;
        margin-right: 0.4rem;
        margin-top: -1px;
        vertical-align: middle;
        left: unset;
        visibility: visible;
    }
</style>

<div class="card valine-card" data-aos="fade-up">
    <div class="comment_headling" style="font-size: 20px; font-weight: 700; position: relative; padding-left: 20px; top: 15px; padding-bottom: 5px;">
        <i class="fas fa-comments fa-fw" aria-hidden="true"></i>
        <span>评论</span>
    </div>
    <div id="vcomments" class="card-content" style="display: grid">
    </div>
</div>

<script src="/libs/valine/av-min.js"></script>
<script src="/libs/valine/Valine.min.js"></script>
<script>
    new Valine({
        el: '#vcomments',
        appId: 'eA9KHUmCz3d6uLMHwpgFrU6D-gzGzoHsz',
        appKey: '6t2AadKbapH6Sni2PmSONMbI',
        notify: 'true' === 'true',
        verify: 'false' === 'true',
        visitor: 'true' === 'true',
        avatar: 'mm',
        pageSize: '10',
        lang: 'en',
        placeholder: 'judge me please!'
    });
</script>

    

    

    

    

    

<article id="prenext-posts" class="prev-next articles">
    <div class="row article-row">
        
        <div class="article col s12 m6" data-aos="fade-up">
            <div class="article-badge left-badge text-color">
                <i class="fas fa-chevron-left"></i>&nbsp;Previous</div>
            <div class="card">
                <a href="/2016/06/22/dom/">
                    <div class="card-image">
                        
                        
                        <img src="/medias/featureimages/1.jpg" class="responsive-img" alt="DOM操作">
                        
                        <span class="card-title">DOM操作</span>
                    </div>
                </a>
                <div class="card-content article-content">
                    <div class="summary block-with-text">
                        
                            
                        
                    </div>
                    <div class="publish-info">
                        <span class="publish-date">
                            <i class="far fa-clock fa-fw icon-date"></i>2016-06-22
                        </span>
                        <span class="publish-author">
                            
                            <i class="fas fa-bookmark fa-fw icon-category"></i>
                            
                            <a href="/categories/javascript/" class="post-category">
                                    javascript
                                </a>
                            
                            
                        </span>
                    </div>
                </div>
                
                <div class="card-action article-tags">
                    
                    <a href="/tags/javascript/">
                        <span class="chip bg-color">javascript</span>
                    </a>
                    
                </div>
                
            </div>
        </div>
        
        
        <div class="article col s12 m6" data-aos="fade-up">
            <div class="article-badge right-badge text-color">
                Next&nbsp;<i class="fas fa-chevron-right"></i>
            </div>
            <div class="card">
                <a href="/2016/05/11/js-closer/">
                    <div class="card-image">
                        
                        
                        <img src="/medias/featureimages/0.jpg" class="responsive-img" alt="闭包">
                        
                        <span class="card-title">闭包</span>
                    </div>
                </a>
                <div class="card-content article-content">
                    <div class="summary block-with-text">
                        
                            
                        
                    </div>
                    <div class="publish-info">
                            <span class="publish-date">
                                <i class="far fa-clock fa-fw icon-date"></i>2016-05-11
                            </span>
                        <span class="publish-author">
                            
                            <i class="fas fa-bookmark fa-fw icon-category"></i>
                            
                            <a href="/categories/javascript/" class="post-category">
                                    javascript
                                </a>
                            
                            
                        </span>
                    </div>
                </div>
                
                <div class="card-action article-tags">
                    
                    <a href="/tags/javascript/">
                        <span class="chip bg-color">javascript</span>
                    </a>
                    
                </div>
                
            </div>
        </div>
        
    </div>
</article>

</div>


<script>
    $('#articleContent').on('copy', function (e) {
        // IE8 or earlier browser is 'undefined'
        if (typeof window.getSelection === 'undefined') return;

        var selection = window.getSelection();
        // if the selection is short let's not annoy our users.
        if (('' + selection).length < Number.parseInt('120')) {
            return;
        }

        // create a div outside of the visible area and fill it with the selected text.
        var bodyElement = document.getElementsByTagName('body')[0];
        var newdiv = document.createElement('div');
        newdiv.style.position = 'absolute';
        newdiv.style.left = '-99999px';
        bodyElement.appendChild(newdiv);
        newdiv.appendChild(selection.getRangeAt(0).cloneContents());

        // we need a <pre> tag workaround.
        // otherwise the text inside "pre" loses all the line breaks!
        if (selection.getRangeAt(0).commonAncestorContainer.nodeName === 'PRE') {
            newdiv.innerHTML = "<pre>" + newdiv.innerHTML + "</pre>";
        }

        var url = document.location.href;
        newdiv.innerHTML += '<br />'
            + 'From: 王大锤学编程<br />'
            + 'Author: wanglian<br />'
            + 'Link: <a href="' + url + '">' + url + '</a><br />'
            + '本文章著作权归作者所有，任何形式的转载都请注明出处。';

        selection.selectAllChildren(newdiv);
        window.setTimeout(function () {bodyElement.removeChild(newdiv);}, 200);
    });
</script>


<!-- 代码块功能依赖 -->
<script type="text/javascript" src="/libs/codeBlock/codeBlockFuction.js"></script>

<!-- 代码语言 -->

<script type="text/javascript" src="/libs/codeBlock/codeLang.js"></script>


<!-- 代码块复制 -->

<script type="text/javascript" src="/libs/codeBlock/codeCopy.js"></script>


<!-- 代码块收缩 -->

<script type="text/javascript" src="/libs/codeBlock/codeShrink.js"></script>


    </div>
    <div id="toc-aside" class="expanded col l3 hide-on-med-and-down">
        <div class="toc-widget card" style="background-color: white;">
            <div class="toc-title"><i class="far fa-list-alt"></i>&nbsp;&nbsp;TOC</div>
            <div id="toc-content"></div>
        </div>
    </div>
</div>

<!-- TOC 悬浮按钮. -->

<div id="floating-toc-btn" class="hide-on-med-and-down">
    <a class="btn-floating btn-large bg-color">
        <i class="fas fa-list-ul"></i>
    </a>
</div>


<script src="/libs/tocbot/tocbot.min.js"></script>
<script>
    $(function () {
        tocbot.init({
            tocSelector: '#toc-content',
            contentSelector: '#articleContent',
            headingsOffset: -($(window).height() * 0.4 - 45),
            collapseDepth: Number('0'),
            headingSelector: 'h2, h3, h4'
        });

        // modify the toc link href to support Chinese.
        let i = 0;
        let tocHeading = 'toc-heading-';
        $('#toc-content a').each(function () {
            $(this).attr('href', '#' + tocHeading + (++i));
        });

        // modify the heading title id to support Chinese.
        i = 0;
        $('#articleContent').children('h2, h3, h4').each(function () {
            $(this).attr('id', tocHeading + (++i));
        });

        // Set scroll toc fixed.
        let tocHeight = parseInt($(window).height() * 0.4 - 64);
        let $tocWidget = $('.toc-widget');
        $(window).scroll(function () {
            let scroll = $(window).scrollTop();
            /* add post toc fixed. */
            if (scroll > tocHeight) {
                $tocWidget.addClass('toc-fixed');
            } else {
                $tocWidget.removeClass('toc-fixed');
            }
        });

        
        /* 修复文章卡片 div 的宽度. */
        let fixPostCardWidth = function (srcId, targetId) {
            let srcDiv = $('#' + srcId);
            if (srcDiv.length === 0) {
                return;
            }

            let w = srcDiv.width();
            if (w >= 450) {
                w = w + 21;
            } else if (w >= 350 && w < 450) {
                w = w + 18;
            } else if (w >= 300 && w < 350) {
                w = w + 16;
            } else {
                w = w + 14;
            }
            $('#' + targetId).width(w);
        };

        // 切换TOC目录展开收缩的相关操作.
        const expandedClass = 'expanded';
        let $tocAside = $('#toc-aside');
        let $mainContent = $('#main-content');
        $('#floating-toc-btn .btn-floating').click(function () {
            if ($tocAside.hasClass(expandedClass)) {
                $tocAside.removeClass(expandedClass).hide();
                $mainContent.removeClass('l9');
            } else {
                $tocAside.addClass(expandedClass).show();
                $mainContent.addClass('l9');
            }
            fixPostCardWidth('artDetail', 'prenext-posts');
        });
        
    });
</script>

    

</main>




    <footer class="page-footer bg-color">
    
        <link rel="stylesheet" href="/libs/aplayer/APlayer.min.css">
<style>
    .aplayer .aplayer-lrc p {
        
        display: none;
        
        font-size: 12px;
        font-weight: 700;
        line-height: 16px !important;
    }

    .aplayer .aplayer-lrc p.aplayer-lrc-current {
        
        display: none;
        
        font-size: 15px;
        color: #42b983;
    }

    
    .aplayer.aplayer-fixed.aplayer-narrow .aplayer-body {
        left: -66px !important;
    }

    .aplayer.aplayer-fixed.aplayer-narrow .aplayer-body:hover {
        left: 0px !important;
    }

    
</style>
<div class="">
    
    <div class="row">
        <meting-js class="col l8 offset-l2 m10 offset-m1 s12"
                   server="netease"
                   type="playlist"
                   id="503838841"
                   fixed='true'
                   autoplay='false'
                   theme='#42b983'
                   loop='all'
                   order='random'
                   preload='auto'
                   volume='0.7'
                   list-folded='true'
        >
        </meting-js>
    </div>
</div>

<script src="/libs/aplayer/APlayer.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/meting@2/dist/Meting.min.js"></script>

    
    <div class="container row center-align" style="margin-bottom: 0px !important;">
        <div class="col s12 m8 l8 copy-right">
            Copyright&nbsp;&copy;
            
                <span id="year">2019-2021</span>
            
            <span id="year">2019</span>
            <a href="/about" target="_blank">wanglian</a>
            |&nbsp;Powered by&nbsp;<a href="https://hexo.io/" target="_blank">Hexo</a>
            |&nbsp;Theme&nbsp;<a href="https://github.com/blinkfox/hexo-theme-matery" target="_blank">Matery</a>
            <br>
            
            &nbsp;<i class="fas fa-chart-area"></i>&nbsp;站点总字数:&nbsp;<span
                class="white-color">115.3k</span>&nbsp;字
            
            
            
            
            <span id="busuanzi_container_site_pv">
                |&nbsp;<i class="far fa-eye"></i>&nbsp;总访问量:&nbsp;<span id="busuanzi_value_site_pv"
                    class="white-color"></span>&nbsp;次
            </span>
            
            
            <span id="busuanzi_container_site_uv">
                |&nbsp;<i class="fas fa-users"></i>&nbsp;总访问人数:&nbsp;<span id="busuanzi_value_site_uv"
                    class="white-color"></span>&nbsp;人
            </span>
            
            <br>
            
            <br>
            
        </div>
        <div class="col s12 m4 l4 social-link ">




    <a href="https://www.facebook.com/xxx" class="tooltipped" target="_blank" data-tooltip="关注我的Facebook: https://www.facebook.com/xxx" data-position="top" data-delay="50">
        <i class="fab fa-facebook-f"></i>
    </a>



    <a href="https://twitter.com/xxx" class="tooltipped" target="_blank" data-tooltip="关注我的Twitter: https://twitter.com/xxx" data-position="top" data-delay="50">
        <i class="fab fa-twitter"></i>
    </a>





    <a href="https://weibo.com" class="tooltipped" target="_blank" data-tooltip="关注我的微博: https://weibo.com" data-position="top" data-delay="50">
        <i class="fab fa-weibo"></i>
    </a>



    <a href="https://www.zhihu.com" class="tooltipped" target="_blank" data-tooltip="关注我的知乎: https://www.zhihu.com" data-position="top" data-delay="50">
        <i class="fab fa-zhihu1">知</i>
    </a>



    <a href="/atom.xml" class="tooltipped" target="_blank" data-tooltip="RSS 订阅" data-position="top" data-delay="50">
        <i class="fas fa-rss"></i>
    </a>

</div>
    </div>
</footer>

<div class="progress-bar"></div>


    <!-- 搜索遮罩框 -->
<div id="searchModal" class="modal">
    <div class="modal-content">
        <div class="search-header">
            <span class="title"><i class="fas fa-search"></i>&nbsp;&nbsp;Search</span>
            <input type="search" id="searchInput" name="s" placeholder="Please enter a search keyword"
                   class="search-input">
        </div>
        <div id="searchResult"></div>
    </div>
</div>

<script type="text/javascript">
$(function () {
    var searchFunc = function (path, search_id, content_id) {
        'use strict';
        $.ajax({
            url: path,
            dataType: "xml",
            success: function (xmlResponse) {
                // get the contents from search data
                var datas = $("entry", xmlResponse).map(function () {
                    return {
                        title: $("title", this).text(),
                        content: $("content", this).text(),
                        url: $("url", this).text()
                    };
                }).get();
                var $input = document.getElementById(search_id);
                var $resultContent = document.getElementById(content_id);
                $input.addEventListener('input', function () {
                    var str = '<ul class=\"search-result-list\">';
                    var keywords = this.value.trim().toLowerCase().split(/[\s\-]+/);
                    $resultContent.innerHTML = "";
                    if (this.value.trim().length <= 0) {
                        return;
                    }
                    // perform local searching
                    datas.forEach(function (data) {
                        var isMatch = true;
                        var data_title = data.title.trim().toLowerCase();
                        var data_content = data.content.trim().replace(/<[^>]+>/g, "").toLowerCase();
                        var data_url = data.url;
                        data_url = data_url.indexOf('/') === 0 ? data.url : '/' + data_url;
                        var index_title = -1;
                        var index_content = -1;
                        var first_occur = -1;
                        // only match artiles with not empty titles and contents
                        if (data_title !== '' && data_content !== '') {
                            keywords.forEach(function (keyword, i) {
                                index_title = data_title.indexOf(keyword);
                                index_content = data_content.indexOf(keyword);
                                if (index_title < 0 && index_content < 0) {
                                    isMatch = false;
                                } else {
                                    if (index_content < 0) {
                                        index_content = 0;
                                    }
                                    if (i === 0) {
                                        first_occur = index_content;
                                    }
                                }
                            });
                        }
                        // show search results
                        if (isMatch) {
                            str += "<li><a href='" + data_url + "' class='search-result-title'>" + data_title + "</a>";
                            var content = data.content.trim().replace(/<[^>]+>/g, "");
                            if (first_occur >= 0) {
                                // cut out 100 characters
                                var start = first_occur - 20;
                                var end = first_occur + 80;
                                if (start < 0) {
                                    start = 0;
                                }
                                if (start === 0) {
                                    end = 100;
                                }
                                if (end > content.length) {
                                    end = content.length;
                                }
                                var match_content = content.substr(start, end);
                                // highlight all keywords
                                keywords.forEach(function (keyword) {
                                    var regS = new RegExp(keyword, "gi");
                                    match_content = match_content.replace(regS, "<em class=\"search-keyword\">" + keyword + "</em>");
                                });

                                str += "<p class=\"search-result\">" + match_content + "...</p>"
                            }
                            str += "</li>";
                        }
                    });
                    str += "</ul>";
                    $resultContent.innerHTML = str;
                });
            }
        });
    };

    searchFunc('/search.xml', 'searchInput', 'searchResult');
});
</script>

    <!-- 回到顶部按钮 -->
<div id="backTop" class="top-scroll">
    <a class="btn-floating btn-large waves-effect waves-light" href="#!">
        <i class="fas fa-arrow-up"></i>
    </a>
</div>


    <script src="/libs/materialize/materialize.min.js"></script>
    <script src="/libs/masonry/masonry.pkgd.min.js"></script>
    <script src="/libs/aos/aos.js"></script>
    <script src="/libs/scrollprogress/scrollProgress.min.js"></script>
    <script src="/libs/lightGallery/js/lightgallery-all.min.js"></script>
    <script src="/js/matery.js"></script>

    <!-- Baidu Analytics -->

    <!-- Baidu Push -->

    
    <script src="/libs/others/clicklove.js" async="async"></script>
    
    

    

    

    <!--腾讯兔小巢-->
    
    

    

    

    
    <script src="/libs/instantpage/instantpage.js" type="module"></script>
    

</body>

</html>
